diff options
Diffstat (limited to 'Lib')
| -rw-r--r-- | Lib/test/test_complex.py | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/Lib/test/test_complex.py b/Lib/test/test_complex.py index f6c7cc3..cecf38f 100644 --- a/Lib/test/test_complex.py +++ b/Lib/test/test_complex.py @@ -437,6 +437,23 @@ class ComplexTest(unittest.TestCase): @unittest.skipUnless(float.__getformat__("double").startswith("IEEE"), "test requires IEEE 754 doubles") + def test_negated_imaginary_literal(self): + z0 = -0j + z1 = -7j + z2 = -1e1000j + # Note: In versions of Python < 3.2, a negated imaginary literal + # accidentally ended up with real part 0.0 instead of -0.0, thanks to a + # modification during CST -> AST translation (see issue #9011). That's + # fixed in Python 3.2. + self.assertFloatsAreIdentical(z0.real, -0.0) + self.assertFloatsAreIdentical(z0.imag, -0.0) + self.assertFloatsAreIdentical(z1.real, -0.0) + self.assertFloatsAreIdentical(z1.imag, -7.0) + self.assertFloatsAreIdentical(z2.real, -0.0) + self.assertFloatsAreIdentical(z2.imag, -INF) + + @unittest.skipUnless(float.__getformat__("double").startswith("IEEE"), + "test requires IEEE 754 doubles") def test_overflow(self): self.assertEqual(complex("1e500"), complex(INF, 0.0)) self.assertEqual(complex("-1e500j"), complex(0.0, -INF)) |